Final answer:
Recombination in progeny can result in four possible phenotypic combinations: YY, Yy, yY, or yy. The genotypic ratio is 1:2:1 for YY:Yy:yy, and the phenotypic ratio is expected to be 3 yellow:1 green.
Step-by-step explanation:
Phenotypic Combinations in Progeny from Recombination
When recombination occurs, the progeny can have different phenotypic combinations depending on the alleles they inherit. In the case of a self-cross of one of the Yy heterozygous offspring, there are four possible allele combinations: YY, Yy, yY, or yy. The genotypic ratio of the progeny is expected to be 1:2:1 for YY:Yy:yy. Additionally, because the YY and Yy offspring have yellow seeds, we expect a phenotypic ratio of 3 yellow:1 green.